Different length of 'e' and a different sound [e] vs [e̞].
'én' has an even longer vowel than 'en' but the same [e] sound.
Like my teacher at the Gypsy school. If i made one tiny mistake, she'd slap me and beat me and insult me for being a Gypsy X'(
EDIT: The teacher travelled with us, and that's how I am a little more intelligent than my other fellow Gypsies, but i still have the scars on my face